Centrifugal clarifier and filter.



fr.- B. MARSHALL. GENTRIPUGAL GLABIFIER AND FILTER. APPLICATION FILED APB..2, 1909.

3 SHEETS-SHEET 1.

@6.1. W/TNESJES.' y y 7 /NVNTR ,4 rom/Ey T. B. MARSHALL. GENTBIFUGAL GLABIFIBB. AND FILTER.

APPIIIOATIOH FILED APB. 2, 1909. Apr' 26 3 SHEETS-SHEET 2.

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T. B. MARSHALL.

GENTRIFUGAL GLARIPIER AND FILTER. APPLIoATIoN FILED APB. 2. 1909.

n 955,890, Patented Apr. 26, 1910.,

3 SHEETS-SHEET 3.

UNTTED sTATEs PATENT OEETOE.

. THOMAS B. MARSHALL, OF TOUGHKEEPSIE, NEW YORK, ASSIGNOR To THE DE LAVAL vSEPARATOR COMPANY, A CORPORATION or NEW JERSEY.

CENTRIFUGAL CLARIFIER AND FILTER.

Specification of Letters Patent.

Patented Apr. 26, 1910.

Application Iiled April 2, 1909. hSerial No. 487,478.

To all lL11/"tom ity/may concern:

siding at Poughkeepsie, county of Dutchess, and State of New York, have invented a new and useful Improvement in Centrifugal Clarifiers and Filters, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, which form a part of this specifi# cation.

My invention is intended to be used to clarify such liquids as varnishes and allied.

products, oils, fruit syrups and extracts, in fact 4all liquids containing a sediment 4deposit even of'the finest stock.

-Speakinv generally, I provide-a preliminary clarification by centrifugal force in a rapidly rotated com art-ment. This compartment may be, anc .in most cases preferably is, provided with inclined plates dividing the liquid under action into thin laminac or-strata, so that the preliminary clarifying is more completely carried on. The sediment collects at and adjacent to the periphery of this compartinelitand when the space left for it is filled up, the machine is stopped and the sediment removed. If the liquid contains excessive quantities of sediment, the

length' of the plates may bereduced to have a greater space at the periphery, or the plates entirely removed, or a rough preliminary separation may take place in a separate bowl without liners. Thevliquid near the center of this compartment, and thus largely free from sediment, is led by an appropriate pas sage to the filtering compartment. rllhis filtering compartment is connected so as to revolve with the first mentioned compartment. It is provided with a plurality of superimposed horizontal filtermg sections forming. separator filtering chambers,V the liquid is led into each of'these chambers from a channel o r passage near the outer surface ot' the filtering compartment,V and passes vertically upwardly or downwardly, or in both directions, through the filtering material, and is `then led from each chamber to discharge passages near the center 'of rotation of the compartment. By-this construction and arrangement of the filtering compartment, the action which causes the liquid `to more .vertically through the filtering material is slight and therefore full time for filtering action is given. The discharge being near' the center there is no danger of. any sediment being carried along with the liquid. The arrangement of the filtering material and the chambers causes the centrifugal force of the rotation of the compartment to force the sediment towardthe periphery of the compartment and thus keep thev filtering material free from sediment and in its most active condition.

In general, my invention consists in a tw'o compartment bowl, in one compartment preliminary clarification takes place by the action of centrifugal force, the partially clarified liquid is then led to a filtering compartment rotating with the first compartment', where it passes vertically through filtering material, and is led to the discharge passage near the center of the compartment, In less general terms, it involves in the filtering, compartment, a series of chambers containing filtering material into which chambers the partially lclarified liquid is distributed near the outer part of the compartment and passes vertically through the filtering material, and is led from each chamber to discharge passages near the centerof the compartment.

I will now describe the embodiment of my invention as illustrated in the accompanying drawings, and then point outthe invention in the claims.

In the drawings: Figure l is a sectional view of an aparatus embodying my invention. Fig. 2 is an enlarged detail view showing a part of the face of the perforated filtering dlsks. Fig. 3 is a similar detail View of the other filtering disk. Fig. 4 is an enlarged section through a portion of the filtering. chamber showing one arrange ment of the disks. "Figs 5 and 6 are similar views showing other arrangement of the disks.l Fig. 7 is an enlarged detail View showing a part of another form of-non-solid filtering disk. Fig. 8 is a section on the line 8-8, Fig. 7.

a and b represent the two compartments of a rotatable bowl.

Aplates f. These plates f do not/,extend to the periphery of the 'compartment a,\there being the space passage .or chamber -g be-v tween their outer ends and they periphery of the compartment, in which the sediment may collect, and when lled the apparatus is stoppedand the sediment removed.

The liquid to he treated enters through inlet tube or pipe@ to the chamber d. -By

centrifugal force, the liquid is forced out through the orifices ev to. the chamber g from which it is' `distributed between theplates The heaviest sediment will. settle in the chamber c before theliquid enters between theplatesf'.' Under the 'action of centrifugal force upon the liquid in the spaces betweenv the plates f, the heavier and solid particles will be forced against .the

y under side of the upper plate ofthe pair of` plates and forced outward on said side or face o'f the plate to'the chamber g. The urified or partially 'purified liquid will be orced inward along the upper face of .the lower plate and upward into the passage or chamber la in the filtering@ compartment b. The filtering compartment b has the hori-. zontal passage or `chamber It and the vertical passage or chamber z', the latter at the periphery of the compartment.y In this compartmentl is a multiple filter or a plurality of filtering chambers 12. Each filtering chamber is formed by the disks 7c and Z and the interposed filtering -material w.

the orifices p. The disk Z 1s provided with the raised ortions'20 forming between said portions the channels 7, These channels radiate toward the central portion of ,the compartment and open into the openings s in the central ridge or `raised portion 4which openskinto the vertical passage u.

The outer ridge o of this disk Z issolid. Between these disks is placed vfilteringmaterial, such, for instance, as 'filtering paper.

The raised portions 20 `of the, disk Z also prevents the filteringmaterial seating on the surface of said disk Z." Any numb/er'r of these filtering. chambers may be.p'ro' vided, dependent upon the size of the filtering compartment. The' partially clarified .liquid passes directly from the passage /t into the lowest filtering chamber. After passing through the filtering material, it follows the channels in the disk Z to 'the orifices s linto the passages u. The liquid is distributed into the other filtering chambers from the'passage or chamber 'Z through the respectiveorifices Theorifices 71`enable an even distribution to be made of the liquid'in thechambers. After .entering the ing material at the" same time,'the move-y l ment being vertical, 'the force is not sufiie cient to cause it to move through the filterf/ ing material toorapidly. v'Ihe discharge -of the liquid from the filtering chambers is at a point where there. is no tendency for it to carry with it any sediment whichmay pass through the filter. The whole tendency of the centrifugal force being not only to prevent this carrying 'with it of sediment but to positively drive any solidmatter tothe passage orchannel z', and thus in addition frees the filtering material from sediment.

In Figs. 7 and 8, I have shown another form of non-solid disk In this case, lthe disk is a skeleton disk yformed with an inner ridge or raised portion n and outer-ridge or raised portion 0 similar to that shown in Fig. 2. The outer rid e These lridges or raised portions, however, unlike `the disk shown in Fig. 2,' are not connected by a perforated portion or late, butare connected by spokes 50, thus orming an open space between the outer and inner ridges through whichthe liquid passes to the filtering material.

' While I have thus far described a construction forthis filtering chamber in which the liquid moved upward through the filter' ing material, the disks can bereversed as shown in Fig. 5, in which case the liquid willpass downwardly through the filtering chamber. I can also, as shown in Fi 6, use a construction in which-the liquid in each filtering chamber can pass in both directions, thus making each filtering chamber -a duplex chamber. v The 'ltering sections and the disks after being assembled are held in proper relation to each other by the cover gj. The orifices or openings p' enable properdivision of the liquid ,between all of the filtering chambers. x/ If the operation be carried on properly, there is llttle danger of the passage or chamber z' being filled with solid matter for a long time as the clarification in the compartment a will leave but little sediment to be removed in compartment b.

While the operation of this machine is not entirely continuous, by properly constructing the compartment a, it can be run for a long time without the passage or chamberl g filling. Thus for\ instance, by reducing the length of the plates f, the passage or chambery may be made larger if the liquid treated contains a high percentage of sediment. Indeed if the amount of sedihasA an opening p.

if. (a

1 munication verticallyv with the filtering ma-' Arotata ment be very great, the plates vmay be removed entirel It is, however, better to luse'the plates if possible, even if it be neces-i sary to make a preliminary clarification in an o n bowl, asv the plates dividing the liqui into thin laminae or strata make more complete the clarification in compartment@ than would be possiblel without their use.

In the construction of Fig. 6 I do not use the perforated or non-'solid plates but use two sets of filterin material fw, each backed up by a soliddisk' Z, as in the ease of the other construction; the two sets of filtering material being separated by the `ring 10 to form the filtering chamber 12. These rings have the inlet orifices a in coii'- nection with passage or chamber z'.

When I' use the terms vertical or vertically and horizontal and horizontally, I am referring to the relation with the axis of the bowl. Thus, horizontal or horizon? -tally refers to a condition not parallel with the axis of the bowl; and vertical or vertically to a condition parallel, or substantially parallel with the axis of the bowl.

This is done-in order to explain clearly that A the apparatus shown may revolve in the position, as shown in the drawings, or at an angle to that position. v

Having now fully described my invention, what I claim and .desire to protect by Letters Patentv is:

1. A centrifugal clarifier and filter, comprisinlg1 in combination atwo compartment void of filtering materia layer or layers of filtering material in the other compartment,

an inlet passage to they first compartment, and a passage rom .the 'first compartment to the second compartment 'in communication vertically with'the filtering material.

2. A centrifugal clarifier yand filter, cornlprising in combination a two compartment rotatable bowl, one com iartment being devoid offiltering material, layer or layers of filtering material in the second copramtment, an inlet passage leading to` theouter portion of the first mentioned compartment, a passage from the inner portion of said compartment t'o the other compartment in come bowl, one com artment being de-l the other side of the filtering material toin the second compartment in communica# tion vertically with one side of the filtering material, and an outlet from the other side of said filtering material.

`5., A centrif'iugal clarifier and filter, coinpri'sinfr in combination a two compartment rotatible bowl, one compartment'being devoid of filtering material, a passage lin the outer portion of said compartment, filtering chamber or chambers in the other compartment, each chamber having filterin material, a passage at the outer portion of said'filtering chamber compartment, a passage connectingthe first compartment and the passage in the outer portion of the filtering chamber compartment, there 4being an opening from said last mentioned passage to the filtering 'chamber in communication vertically with oneside of the filtering material, and an outlet at the inner portion of the chamber on the opposite side of the filtering material. l l

6. A centrifugal clarifier and filter, comprising in combination, a two compartment rotatable'bowl, superimposed inclined plates extending from near the periphery to near the inner end of the first com artment, said compartment being devoid o filtering material, layer or layers of filtering material in lthe'other compartment, an inlet passage to the -first compartment, and a passage from the first compartment to the second compartment in communication vertically with thel filtering material.

7. A centrifugal clarifier and filter, coniprising in combination, a two compartment rotatable bowl, superimposed inclined plates extending from ric-.ir the periphery to near the inner end 0f the first coin iaitinent, said compartment being devoid o filtering ma vterial, horizontal layer or layers of filtering material in the other compartment, an inlet passage to the first compaitment,and a passage from the first compartment to the second compartment, there being an inlet in the second compartment to one horizontal side of the` filtering material, and an outlet from the other side of said filtering material.

8. A centrifugal clarifier and filter, coinprising in combination a two compartment rotatable bowl, one compartment beingidevoid offiltering material, superimposed inclined plates extending from near the periphery to vnear the inner end of said first zontal solid grooved disk in said compartment filtering material between said disks, an inlet or inlets to one side of the filtering material, and an outlet from the other side of the filtering material.v

19. In an apparatus of the character described, in combination a rotating compartment, a horizontal disk, adapted to allow the liquid to pass therethrough, and a hori zontal solid grooved disk in said compartment, filtering material between said disks, an inlet or inlets to one side of the filtering material, and an outlet from the other side ofthe filtering material, there being a passage between the disks and the periphery ofl the compartment communicating with the said inlet or inlets, and a passage between the inner portion of the compartment and the disks communicating with said outlet or outlets.

20. In an apparatus of the character described, in Acombination a rotating compartment, a plurallty of filtering chambers 1n` said compartment, each chamber having a perforated disk adapted to allow the liquid l to pass therethrough, Aand a solid horizontal grooved disk, and filtering materialbetween said disks, an inlet or inlets to each chamber on one side ofthe filtering material, and an outlet from each chamber on the other side of said filtering material.

21. In an apparatus of the character described, in combination a rotating compartment, asplurality of filtering chambers in said compartment, each chamber having a perforated disk, adapted to allow the liquid to pass-therethrough, and a solid horizontal grooved disk, and filtering material between said disks, an inlet or inlets to each chamber on one side of the filtering material, and an outlet from each chamber on the other side of said filtering material, there being a passage between the disks and the periphery lof the compartment communicating with the said inlet or inlets, and al passage between they inner portion of the com artment and the disks communicating wit said outlet or outlets.

22.'In an ap aratus of the character de` scribed, in com ination a rotatin@r compartment, a horizontal disk, adapted to allow the liquid to pass therethroughsaid disk having a ledge, a solid horizontal disk having a ledge, filtering material between said disks, an inlet orifice or orifices in the ledge of the first mentioned disk, andan outlet orifice or orifices in the ledgeof the solidv dlsk.

23. In an apparatus of the character described, in combination a rotatin' compartment, a horizontal. disk, adapte to allow the liquid to pass therethrough, said disk having a ledge, a solid grooved horizontal disk having a ledge, filtering material be horizontal disk,

tween said disks, an inlet orifice or orifices orifice or orifices in the ledge of the solid disk, there being a passage between the disks and the periphery ofthe compartment communicatingwith the said inlet or inlets, and a passage between the inner portion of the compartment and the disks communicating with said outlet or outlets.

25. In an apparatus of the character described, in combination a rotating compartment, a horizontal disk, adapted to allow the liquid to pass therethrough, said-disk having a ledge, a so'lid grooved horizontal disk having a ledge,` filtering material between lsaid disks, an inlet orifice or orifices in the ledge of thev first mentioned disk, and an outlet orifice or orifices inthe ledge of the solid disk, there being a passage between the disks and the periphery of the compartinentcoinmunicating with the said inlet or inlets, and a passage between the inner p0rtion of the compartment and the disks coml municatilig wit said outlet or outlets.

26. In an apparatus of the character described, in combination a rotating compartment, a plurality of filtering chambers in said com artment, each chamber having a horizonta disk, adapted to allow the liquid to ass therethrough, and a solid horizontal dis t, and flterin material between said disks, each disk iaving a ledge, an inlet orifice or orifices, in the ledge of the first mentioned disk, and an outlet or outlets in the ledge of the solid disk.

27. In an apparatus of the character described, in combination a rotating compartment, a plurality of filtering chambers in said compartment, each chamber having a to pass therethrough, and a solid grooved horizontal4 disk, and filtering material between said disks, each disk havin a led e, an inletl orice or orifices in the legge of t e first-mentioned disk, and an outlet or outlets in the ledge of the solid disk.

y In'testimony of which invention, 4I have vhereunto sety my hand, at New York, on this 27th day of March, 1909.

' THOMAS B. MARSHALL.l

Witnesses RALPH STODDARD, 4ROBERT H. HEEP.,

adapted to allow the liquid 

